老師和清華大學(xué)出版社出版的《Oracle SQL入門與實(shí)戰(zhàn)經(jīng)典》中講得很多例子一模一樣,推薦一下,各有側(cè)重點(diǎn)吧!挺喜歡這個(gè)老師的講課風(fēng)格的。
2016-10-28
不得了!看到報(bào)表這個(gè)詞,突然對(duì)SQL*Plus有了一個(gè)新認(rèn)識(shí)
2016-10-27
select CI_ID ,wm_concat(stu_name) from pm_ci a ,pm_stu b where instr(a.stu_ids,b.stu_id) >0
group by CI_ID
group by CI_ID
2016-10-25
instr(a,b)函數(shù)也可以用模糊查詢代替
select c.c_id,wmsys.wm_concat(s.stu_name)
from course c,student s
where c.stu_ids like '%'||s.stu_id||'%'
group by c.c_id;
select c.c_id,wmsys.wm_concat(s.stu_name)
from course c,student s
where c.stu_ids like '%'||s.stu_id||'%'
group by c.c_id;
2016-10-14